

https://github.khronos.org/glTF-Sample-Viewer-Release/   viewer

https://redstapler.co/add-3d-model-to-website-threejs/   html example


from:  https://kcoley.github.io/glTF/#loaders-and-viewers

https://sandbox.babylonjs.com/  :  right btn    -->   pan
                                   left btn     -->   rotate
                                   scroll wheel -->   zoom

                                   can drop several files for a composite


